package com.mall.generator.util;

import com.alibaba.fastjson.JSONObject;
import com.mall.common.constant.GenConstants;
import com.mall.common.utils.DateUtils;
import com.mall.common.utils.StringUtils;
import com.mall.generator.config.GenConfig;
import com.mall.generator.domain.GenTable;
import com.mall.generator.domain.GenTableColumn;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import org.apache.velocity.VelocityContext;

/**
 * Created by zhonglin on 2020/4/8.
 */
public class VelocityUtils {

  /**
   * 项目空间路径
   */
  private static final String PROJECT_PATH = "main/java";

  /**
   * mybatis空间路径
   */
  private static final String MYBATIS_PATH = "main/resources/mapper";

  /**
   * html空间路径
   */
  private static final String TEMPLATES_PATH = "main/resources/templates";

  /**
   * 设置模板变量信息
   *
   * @return 模板列表
   */
  public static VelocityContext prepareContext(GenTable genTable) {

    String moduleName   = genTable.getModuleName();
    String businessName = genTable.getBusinessName();
    String packageName  = genTable.getPackageName();
    String tplCategory  = genTable.getTplCategory();
    String functionName = genTable.getFunctionName();

    VelocityContext velocityContext = new VelocityContext();
    velocityContext.put("tplCategory", genTable.getTplCategory());
    velocityContext.put("tableName", genTable.getTableName());
    velocityContext.put("functionName", StringUtils.isNotEmpty(functionName)
        ? functionName
        : "【请填写功能名称】");
    velocityContext.put("ClassName", genTable.getClassName());
    velocityContext.put("className", StringUtils.uncapitalize(genTable.getClassName()));
    velocityContext.put("moduleName", genTable.getModuleName());
    velocityContext.put("businessName", genTable.getBusinessName());
    velocityContext.put("basePackage", getPackagePrefix(packageName));
    velocityContext.put("packageName", packageName);
    velocityContext.put("author", genTable.getFunctionAuthor());
    velocityContext.put("datetime", DateUtils.getDate());
    velocityContext.put("pkColumn", genTable.getPkColumn());
    velocityContext.put("importList", getImportList(genTable.getColumns()));
    velocityContext.put("permissionPrefix", getPermissionPrefix(moduleName, businessName));
    velocityContext.put("columns", genTable.getColumns());
    velocityContext.put("table", genTable);
    if (GenConstants.TPL_TREE.equals(tplCategory)) {
      setTreeVelocityContext(velocityContext, genTable);
    }
    return velocityContext;
  }

  public static void setTreeVelocityContext(VelocityContext context,
                                            GenTable genTable) {

    String     options        = genTable.getOptions();
    JSONObject paramsObj      = JSONObject.parseObject(options);
    String     treeCode       = getTreecode(paramsObj);
    String     treeParentCode = getTreeParentCode(paramsObj);
    String     treeName       = getTreeName(paramsObj);

    context.put("treeCode", treeCode);
    context.put("treeParentCode", treeParentCode);
    context.put("treeName", treeName);
    context.put("expandColumn", getExpandColumn(genTable));
    if (paramsObj.containsKey(GenConstants.TREE_PARENT_CODE)) {
      context.put("tree_parent_code", paramsObj.getString(GenConstants.TREE_PARENT_CODE));
    }
    if (paramsObj.containsKey(GenConstants.TREE_NAME)) {
      context.put("tree_name", paramsObj.getString(GenConstants.TREE_NAME));
    }
  }

  /**
   * 获取模板信息
   *
   * @return 模板列表
   */
  public static List<String> getTemplateList(String tplCategory) {

    List<String> templates = new ArrayList<String>();
    templates.add("vm/java/domain.java.vm");
    templates.add("vm/java/mapper.java.vm");
    templates.add("vm/java/service.java.vm");
    templates.add("vm/java/controller.java.vm");
    templates.add("vm/xml/mapper.xml.vm");
    if (GenConstants.TPL_CRUD.equals(tplCategory)) {
      templates.add("vm/html/list.html.vm");
    } else if (GenConstants.TPL_TREE.equals(tplCategory)) {
      templates.add("vm/html/tree.html.vm");
      templates.add("vm/html/list-tree.html.vm");
    }
    templates.add("vm/html/add.html.vm");
    templates.add("vm/html/edit.html.vm");
    templates.add("vm/sql/sql.vm");
    return templates;
  }

  /**
   * 获取文件名
   */
  public static String getFileName(String template,
                                   GenTable genTable) {
    // 文件名称
    String fileName = "";
    // 包路径
    String packageName = genTable.getPackageName();
    // 模块名
    String moduleName = genTable.getModuleName();
    // 大写类名
    String className = genTable.getClassName();
    // 业务名称
    String businessName = genTable.getBusinessName();

    String javaPath    = PROJECT_PATH + "/" + StringUtils.replace(packageName, ".", "/");
    String mybatisPath = MYBATIS_PATH + "/" + moduleName;
    String htmlPath    = TEMPLATES_PATH + "/" + moduleName + "/" + businessName;

    if (template.contains("domain.java.vm")) {
      fileName = StringUtils.format("{}/domain/{}.java", javaPath, className);
    } else if (template.contains("mapper.java.vm")) {
      fileName = StringUtils.format("{}/mapper/{}Mapper.java", javaPath, className);
    } else if (template.contains("service.java.vm")) {
      fileName = StringUtils.format("{}/service/{}Service.java", javaPath, className);
    } else if (template.contains("controller.java.vm")) {
      fileName = StringUtils.format("{}/controller/{}Controller.java", javaPath, className);
    } else if (template.contains("mapper.xml.vm")) {
      fileName = StringUtils.format("{}/{}Mapper.xml", mybatisPath, className);
    } else if (template.contains("list.html.vm")) {
      fileName = StringUtils.format("{}/{}.html", htmlPath, businessName);
    } else if (template.contains("list-tree.html.vm")) {
      fileName = StringUtils.format("{}/{}.html", htmlPath, businessName);
    } else if (template.contains("tree.html.vm")) {
      fileName = StringUtils.format("{}/tree.html", htmlPath);
    } else if (template.contains("add.html.vm")) {
      fileName = StringUtils.format("{}/add.html", htmlPath);
    } else if (template.contains("edit.html.vm")) {
      fileName = StringUtils.format("{}/edit.html", htmlPath);
    } else if (template.contains("sql.vm")) {
      fileName = businessName + "Menu.sql";
    }
    return fileName;
  }

  /**
   * 获取项目文件路径
   *
   * @return 路径
   */
  public static String getProjectPath() {

    String       packageName = GenConfig.getPackageName();
    StringBuffer projectPath = new StringBuffer();
    projectPath.append("main/java/");
    projectPath.append(packageName.replace(".", "/"));
    projectPath.append("/");
    return projectPath.toString();
  }

  /**
   * 获取包前缀
   *
   * @param packageName 包名称
   *
   * @return 包前缀名称
   */
  public static String getPackagePrefix(String packageName) {

    int    lastIndex   = packageName.lastIndexOf(".");
    String basePackage = StringUtils.substring(packageName, 0, lastIndex);
    return basePackage;
  }

  /**
   * 根据列类型获取导入包
   *
   * @param column 列集合
   *
   * @return 返回需要导入的包列表
   */
  public static HashSet<String> getImportList(List<GenTableColumn> columns) {

    HashSet<String> importList = new HashSet<String>();
    for (GenTableColumn column : columns) {
      if (!column.isSuperColumn() && GenConstants.TYPE_DATE.equals(column.getJavaType())) {
        importList.add("java.util.Date");
      } else if (!column.isSuperColumn() && GenConstants.TYPE_BIGDECIMAL.equals(column.getJavaType())) {
        importList.add("java.math.BigDecimal");
      }
    }
    return importList;
  }

  /**
   * 获取权限前缀
   *
   * @param moduleName   模块名称
   * @param businessName 业务名称
   *
   * @return 返回权限前缀
   */
  public static String getPermissionPrefix(String moduleName,
                                           String businessName) {

    return StringUtils.format("{}:{}", moduleName, businessName);

  }

  /**
   * 获取树编码
   *
   * @param options 生成其他选项
   *
   * @return 树编码
   */
  public static String getTreecode(JSONObject paramsObj) {

    if (paramsObj.containsKey(GenConstants.TREE_CODE)) {
      return StringUtils.toCamelCase(paramsObj.getString(GenConstants.TREE_CODE));
    }
    return "";
  }

  /**
   * 获取树父编码
   *
   * @param options 生成其他选项
   *
   * @return 树父编码
   */
  public static String getTreeParentCode(JSONObject paramsObj) {

    if (paramsObj.containsKey(GenConstants.TREE_PARENT_CODE)) {
      return StringUtils.toCamelCase(paramsObj.getString(GenConstants.TREE_PARENT_CODE));
    }
    return "";
  }

  /**
   * 获取树名称
   *
   * @param options 生成其他选项
   *
   * @return 树名称
   */
  public static String getTreeName(JSONObject paramsObj) {

    if (paramsObj.containsKey(GenConstants.TREE_NAME)) {
      return StringUtils.toCamelCase(paramsObj.getString(GenConstants.TREE_NAME));
    }
    return "";
  }

  /**
   * 获取需要在哪一列上面显示展开按钮
   *
   * @param genTable 业务表对象
   *
   * @return 展开按钮列序号
   */
  public static int getExpandColumn(GenTable genTable) {

    String     options   = genTable.getOptions();
    JSONObject paramsObj = JSONObject.parseObject(options);
    String     treeName  = paramsObj.getString(GenConstants.TREE_NAME);
    int        num       = 0;
    for (GenTableColumn column : genTable.getColumns()) {
      if (column.isList()) {
        num++;
        String columnName = column.getColumnName();
        if (columnName.equals(treeName)) {
          break;
        }
      }
    }
    return num;
  }

}